I would email support about your licensing issue, see here: http://startisback.com/#support-tab
I've had luck exporting
HKEY_CURRENT_USER\Software\StartIsBack
to a .reg file. However since many of SAB's features either use legacy or reimplemented Windows components some settings will be in other parts of the registry and will need to be reconfigured unless you want to track down those exact registry settings which isn't really recommended.